My best advice, (Which you can take or ignore), is to simply put, "Ignore what everyone else thinks".
Have you ever noticed that the people who get made fun of most, are the ones who hate it the most, Coincidence? I think not.
People like to take please off of someone elses suffering, so when someone is getting made fun if, and they get offended, it only leeds to more insults because it gives the other people please.
You might be thinking, "What does this have to do with my topic?"
Well you seem to have a fear of rejection, which is rather pointless, and can hurt you a large amount. If you do get rejected, don't make a big deal about it, or any deal, just ignore it and move on.
Again you might be thinking "But its not that easy people are going to bug me about it..."
Well who cares what they think, i know you shouldn't. It doesn't matter what anyone else thinks about you, because they hardly ever do. You need to remember that your identity is how you define it, meaning you can be a complete loser, but if you feel and act strong and confident, people will see you as strong and confident.
So again to reinterate, Don't worry what anyone else thinks about you, and as for failing "Aim for the moon, cause even if you miss at least your one of the stars."